
\begin{frame}
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    \titlepage
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    \begin{center}
    \begin{tabular}{ccc}
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        \includegraphics[height = 1.3cm]{logo_unipd} &
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        $~~~$ &
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        \includegraphics[height = 1.3cm]{logo_dei_big} \\
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    \end{tabular}
    \end{center}
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    \vspace{0.3cm}
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    \begin{center}
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        \includegraphics[height = 0.2cm]{creative_commons_license}
        %
        \\
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        \begin{tikzpicture}
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            \node[rectangle, font=\tiny, color=gray]
            {Content in this presentation is licensed under a Creative Commons Attribution 3.0 License};
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        \end{tikzpicture}
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    \end{center}
    %
\end{frame}
